Auto toggle hide discussions after it is resolved
## Summary There is a UX inconsistency in the MR discussions. When you have more than 1 discussion inside a MR and you decide to resolve one of them, that discussion does not get toggled (hidden). But when you refresh the page, the discussion that was resolved becomes hidden. ## Steps to reproduce 1. Go to a MR with more than 1 discussion 2. Resolve 1 discussion (notice how the discussion does not hide/toggle) 3. Refresh page (notice how the discussion is now hidden) ## Expected behavior Discussion should be hidden after it is resolved to stay consistent with the UX when the page is refreshed ## Relevant logs and/or screenshots Step 1 (MR with more than 1 discussion) ![Screen_Shot_2016-08-22_at_12.08.49_PM](/uploads/06297d87237b3571a07282d4506407af/Screen_Shot_2016-08-22_at_12.08.49_PM.png) Step 2 (Resolve discussion, discussion is not hidden) ![Screen_Shot_2016-08-22_at_12.08.56_PM](/uploads/b23e65c21c79dd1b48579126eb3ae870/Screen_Shot_2016-08-22_at_12.08.56_PM.png) Step 3 (Refresh page, discussion is now hidden) ![Screen_Shot_2016-08-22_at_12.09.04_PM](/uploads/cc0beb2e00bdbae5abea5a12783904bd/Screen_Shot_2016-08-22_at_12.09.04_PM.png)
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